package ooday03;

public class InterfaceDemo {
    public static void main(String[] args) {

    }

}
interface Inter{
    abstract void show();
    void test();
    //void sayHi(){};//编译错误，抽象方法不能有方法体

}

class InterImpl implements Inter{
    @Override
    public void show() {

    }

    @Override
    public void test() {

    }
}

interface Inter1{
    void show();
}
interface Inter2{
    void test();
}
abstract class Aoo{
    abstract void say();
}
class Boo extends Aoo implements Inter1,Inter2{
    public void show(){}
    public void test(){}
    void say(){}
}

//接口继承接口
interface Inter3{
    void show();
}

interface Inter4 extends Inter3{
    void test();
}

class Coo implements Inter4{
    public void show(){}
    public void test(){}
}